Combing machine



J. W. NASMITH.

COMBING MACHINE.

APPLICATION FILED AUG.3, 1916.

1,402,369. I Patehted Jan. 3, 1922,

A 1'' Fun MW Q L} JOHN WILLIAM NASIVIITH, F EEAI'ON IJLERSEY, ENGLAIVD.

contents MACHINE.

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Specification of Letters Eatent.

Patented J an. 3, 1922.

Application filed August '3, 1916. Serial No. 112,917.

(GRANTED UNDER THE PROVISISHS OF THE .ACT 0]? MARCH 3, 1.921, 41 STAT.L, 1313.).

' I have filed application in England, July 20, 1915, Patent 10,502,sealed March 7, 19127,) of which the following is aspecification.

This invention relates to improvements in combingmachines ofthe-Heilmann type and more particularly-to the feeding mechanism,

such as that illustrated in British Patent 3871 of 1914. p In machinesof this type it has beenused to employ aratchet wheel fixed upon the end.of-the feed roller, and operated onby a pawl or rack to produce thenecessary rotation. This has been done in .one of two ways.

In one form a rack is caused to engage and disengage with the :feedroller ratchet. Whilst engaged the rack is givenan inclependent movementfrom an extraneous source to cause the rotation and when disengaged, isdrawn back to its initial position, ready for the next stroke.

In another form a lever, rocking-loosely upon the end of the feed rolleritself, has pivoted on it, a paWl engaging with the ratchet, some pointon the lever being held stationary in relation to the bodily to and fromotion of the feed roller, so that when the feed roller is moved bodilyin one direction in relation to such fixed point, the pawl engages withand turns the ratchet and when moved in the other direction the pawlrides.

over the teeth of the ratchet until motion in the opposite directionrecommences. In

' all such arrangements the rotary motion of the feed roller commencesimmediately the roller moves in relation to the fixed point.

The object of my invention is to so arrange the parts, that a certaincommon bodily movement of the feed roller and its ratchet may take placewithout producing any rotary motion of the roller and to provide meansto vary easily the extent of that common motion and consequently of theextent of the rotary motion and thus regulate at will the amount ofmaterial fed each stroke. According to this invention the usual ratchetwheel on the end of the feed roller is actuated by-means of a pawl 01-toothcd segment or rack so mounted that it canaccompany the ratchetduringits reciprocations, due to the bodily movement of the feed roller,through a variable portion of such movements; during the backwardmovement of the feed roller, the ratchet and pawl first move together inengagement without .I'Qiativc movement and afterwards the pawl stops andrides over the ratchet, which continues to move bodily backward; duringthe forward movement of the feed roller the pawl and ratchet firstmovetogether a distance equal to their previous simultaneous movementbackward, andthen thepawl'stops and remaining in engagement with theratchet rotates the latter, and consequently the feed roller.

Ina :preferredconstruction according to this inventionthe pawlrismounted uponia rocking lever provided with means for :restricting itsamplitude of movement :and with-means that cause the pawl to tend .tomove in the direction of the backward movement of the feedroller; byvaryingthe amplitude of the levers movement-for *ex ample, by set screwsadapted to .come into contact with the frame or other fixedpart of themachine-tl1elength of the simultaneousmovement of the pawl and'ratchetcan be varied; and by causing the pawl.by..-a weight on the lever, orequivalent meansto tend to move back with the feed roller, it is ensuredthat the ineffective simultaneous movements in each direction re equal.

The accompanying drawing shows in side elevation one construction ofcombing machine feed-roller actuating mechanism according to thisinvention.

K is a portion of the frame of the machine and N is a fixed pivot uponwhich the frame of the nipper is pivoted. In the drawings only the lowerjaw p is shown, the nipper frame being omitted. F is the feed roller onthe end of which is a ratchet f; and f is a rocking lever pivoted freelyupon N and having pivoted at its lower end a pawl 01' toothed rack fprovided with teeth adapted to engage with those of the ratchet f, forwhich purpose they are on an arc struck from the centre of the pivot Nso that as the nipper swings forward upon the said pivot-carrying thefeed roller with it-the teeth of the pawl f will always be adapted toengage with those ol' the ratchet wheel The lever j is provided with setscrews and f adapted to come. into contact with the frame K and thus tol nit the amplitude of the levers movement. A weight f" tends to causethe said lever to rock in a count rclockwise direction.

The operation is as follows: W hen the nipper is at the end of itsforward stroke the parts are in the position shown in the figure thecentre or the feed roller lying upon the radial line :0 the lever f"being held with its stud f against the frame K owing to the engagementof the pawl and ratrhet f', f. As the nipper and feed roller F movebackward the pawl f and lever f (under the influence of the weight 7")follow until the stud 7' comes against the frame; this stops thesimultaneous movement of the lever and pawl and through the remainder ofthe backward movement of the nipper, the pawl f rides over the teeth ofthe ratchet until the centre of the feed roller lies on the radial line00. The nipper then commences its forward swing, carrying with it thefeed roller the ratchet f of which is in engagement with the pawl:during the early portion of the forward movement of the nipper and feedroller the lever f is rocked about the pivot N until the stud f comesinto contact with the frame; after such contact the lever j" and itspawl f are held stationary and the contin ued bodily movement of theteed roller causes the latter to receive a rotary movement. The amountof the said rotary movement can be varied by adjusting the studs f f,thus Varying the amount of bodily forward movement of the feed roller(with the nipper) during which rotary motion is not imparted by the pawl7' to the roller and consequently varying the amount of rotation of thefeed roller and the amount of material fed forward every stroke.

Claims.

1. As an improvement in combing machines, a pawl provided with rackteeth, means for movably supporting said pawl, a feed roll movablerelative to said pawl, a ratchet wheel attached to said feed roll andengaging said rack teeth, and means for limiting movement of said pawl.

52. As an improvement in combing machines, a pivotally supported lever,a pawl provided with rack teeth, means for movably supporting said pawl,a feed roll movable relative to said pawl, a ratchet wheel attached tosaid feed roll and engaging said rack teeth, and means tor limitingpivotal mov ment of said lever.

As an improvement in combing ma.- chines, a pivotally supported lever, apawl provided with rack teeth, means for movably supporting said pawl, afeed roll movable relative to said pawl, a ratchet wheel attached tosaid feed roll and engaging said rack teeth, adjustable abutments forlimiting pivotal movement of said lever, and a counterweight carried bysaid lever.

at. As an improvement in combing machines, a pivotally supported lever apawl pivoted to the lever and provided with rack teeth, means formovably supporting said pawl, a feed roll movable relative to said pawl,a ratchet wheel attached to said teed roll and engaging said rack teeth,and

means for limiting movement of said pawl.

In testimony whereof I have affixed my signature, in presence of twowitnesses.

JOHN WVILLIAM NASMITH.

Witnesses:

EnNoLn SIMPSON MosELnY, GEORGE lVnAVnR.

